When he ______the door, he found his keys were nowhere.
Doctor have said that as many as 50% of patients don’t take medicine _______.
In April last year, thousands of holiday-makers in Europe remained ___________ abroad due to the volcanic ash cloud.
The purpose of the research had a more important meaning for them than_______.
Could I speak to ________ is in charge of International Sales, please?
The seaside here draws a lot of tourists every summer. Warm sunshine and soft sands make ________ it is .